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Cross Validated : Recent Questions and Answers (Page 8)

Find answers to your questions about Cross Validated or help others by answering their Cross Validated questions.

Should we really do Re-Sampling in Class Imbalance data?

I have been doing ML for quite some time and I have a thought in class imbalance problems that has bothered me quite a lot. In problems where we have...

Asked on 12/27/2021 by Baktaawar

2 answer

How to determine data size is statistically efficient?

I have a question about the data size for probability of default model.For each consumer, I have a binary bit to indicate whether the client goes default or not...

Asked on 12/27/2021 by 1111ktq

0 answer

(Non-limit) distribution of maxima from different univariate, discrete and stationary time series

Motivation: I'm currently studying the convergence of maxima from simulated time series to max-stable distributions, and in order to do so, I want to better understand the penultimate distribution of...

Asked on 12/27/2021

1 answer

Confused about stationarity and ARIMA processes

So I am quite confused about stationarity in ARIMA processes. For example, a Random Walk is an ARIMA process with order (1,0,0). Does this mean that a Random walk is...

Asked on 12/27/2021

2 answer

How to remove correlated features?

I have a small dataset (200 samples and 22 features) and I am trying to solve a binary classification problem. All my features are continuous and lie on a scale...

Asked on 12/27/2021 by iCHAIT

1 answer

Between- and within-person level effects when using multilevel modelling for longitudinal data in R

I’m using nlme package in R for analysing longitudinal data. The aim is to understand if changes in need satisfaction (TNS) and need frustration (TNF) predict changes in well-being (WBtot)...

Asked on 12/27/2021 by AF1402

1 answer

How can I separate the abundance factor of the incidence results?

I must calculate the incidence values for Watermelon Mosaic Virus in different seasons within of habitat. This incidence data comes from infection detection of some plant sampled in different habitats...

Asked on 12/27/2021

0 answer

Chi Square Test on non-numeric data in R

Currently, I'm working on an R project for the university. Based on this table: https://drive.google.com/file/d/13aJr5MHLxJ5Zgv0ZdoQzPU7PutLGTDS4/view?usp=sharingA company would like to introduce an electronic negotiation support system. At the...

Asked on 12/27/2021 by Ruffybeo

0 answer

How to make correlation test with compositional data?

I have a compositional data set> str(dfa)'acomp' num [1:53, 1:4] 0.263 0.26 0.264 0.266 0.255 ...- attr(*, "dimnames")=List of 2..$ : chr [1:53] "3" "4" "5" "6" .....$...

Asked on 12/27/2021

0 answer

What are the parameters in signal recovery? Whether source of these parameters are the sampling property of impulse response?

I was reading the following book: Juditsky, Anatoli, and Arkadi Nemirovski. Statistical Inference via Convex Optimization. Vol. 69. Princeton University Press, 2020. Here, I could not visualize the appearance of...

Asked on 12/27/2021 by Lakshman

0 answer

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